Based on 13,048 Energy Performance Certificates, TW3 in Hounslow has an average EPC score of 70 out of 100, placing it around the national average. To put this in context, the national average sits at 67. The most common rating band is D, with 24.7% of homes rated A or B and 65.3% in the C or D bands. Meanwhile, 1.3% of homes sit in the F or G bands — the least efficient categories. In practical terms, a rating of D means many homes here lose more heat than average — potentially adding £200-400 per year to energy bills compared to a C-rated home.

Most of the housing stock here consists of flats. Flats alone account for 58% of all certificated properties — a distinctly urban profile. Around 47% of properties are owner-occupied , while 39% are privately rented . That high proportion of rental homes matters — landlords in TW3 must comply with the Minimum Energy Efficiency Standards (MEES), which currently require at least an EPC E rating. Properties rated F or G cannot legally be let. Gas central heating is the main fuel source for 64% of homes, which is typical for urban areas across England.

There is genuine room for improvement here. If every recommended upgrade were carried out, the average score could climb from 70 to 80 — a 10-point jump that would lift the typical rating to C. If you live in TW3 and want to reduce your energy bills, start with our guide to loft insulation — it is one of the most cost-effective upgrades you can make.